Battery Life

[rockcandymounta]

I posted this question on another RV forum and Ill be darned if I can find that forum. (arrgh). So much for keeping good notes.

Anyway, I have a 2016 Dutchman Denali 38ft 5th Wheel.

I'm thinking the batteries need replacing because when I am on battery power and attempt to use the auto leveling feature, I get a low voltage error.

However before I buy 2 new batteries, Id like to be able to test and see if the rig is charging the batteries when plugged into shore power.

I have one of the Harbor Freight cheap multimeter but know nothing about how to use it to check volts, etc. Any help would be appreciate.

Thanks

[Super_Dave]

opnspaces has you dialed in with the multi meter. FYI, a battery can show a good charge but fail a load test so taking them to your nearest auto parts store to get tested or buy the HF version and it will help confirm bad batteries. Check the fluid levels.

[opnspaces]

Assuming you have the same or similar meter, I circled the important parts in yellow.

Turn the knob to DCV 20. That indicates you want to measure DC voltage and no more than 20 volts. (Typically set the voltage to the nearest voltage you expect while rounding up)

Plug the red test lead into the middle port
Plug the black lead into the bottom port.

Turn the meter on.

unplug the shore power cord for the trailer.

1. Now touch and hold the pointy end of the red test lead to the positive or (+) post on the battery
2. Touch and hold the pointy end of the black test lead to the negative or (-) post on the battery

This is your battery voltage. Write it down.

Now plug the shore power cord back in.

Repeat the two steps above to take a second voltage.

If your system is charging you should get a higher voltage at the batteries.

If needed post your two voltage measurements and we can help you determine if it's charging.

Read the display for your voltage.

Click For Full-Size Image.